I just bought a RPI3 B+ with the hopes of using it as a media encoding box. I built ffmpeg, and use the following to transcode media from h264 to h265
ffmpeg -i "$i" -c:v libx265 -crf 28 -c:a aac -b:a 128k -preset slow output.mp4
The issue is that regardless of what I use as the preset, it runs at about 1 FPS. Is there any way to speed it up, or is it just a limitation of the RPI?